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Cell Membrane: Transport What goes in? What goes out?

Published byErik Bryan Modified over 6 years ago

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Presentation on theme: "Cell Membrane: Transport What goes in? What goes out?"— Presentation transcript:

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2 Cell Membrane: Transport What goes in? What goes out?

3 Cell membrane – Lipid bilayer that controls flow of materials into and out of the cell.
Fluid mosaic model

4 Passive Transport - No Energy Required
Active Transport – Energy Required

5 Passive transport Diffusion Facilitated Diffusion Osmosis

6 PASSIVE - DIFFUSION Particles move from areas of high concentration to low concentration. (Down concentration gradient) Particles spread evenly. Does NOT require energy. (Natural movement of molecules)

7 PASSIVE - DIFFUSION Particles move from areas of high concentration to low concentration. (Down concentration gradient) Particles spread evenly. Does NOT require energy. (Natural movement of molecules)

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9 PASSIVE - Facilitated diffusion
Charged and large particles can be carried through protein channels. Fast and specific Move from high to low concentration

10 Passive - osmosis Diffusion of WATER through a selectively permeable membrane. When the particles are too big to fit through the membrane, WATER moves across the membrane.

11 OSMOSIS or DIFFUSION?

12 OSMOSIS or DIFFUSION?

13 OSMOSIS or DIFFUSION?

14 OSMOSIS or DIFFUSION?

15 OSMOSIS or DIFFUSION?

16 OSMOSIS or DIFFUSION?

17 OSMOSIS or DIFFUSION? Amoeba Sisters - Osmosis

18 Passive Transport - No Energy Required
Active Transport – Energy Required

19 ACTIVE transport Active transport requires energy (ATP).
Materials move from low to high concentration (against gradient).

20 Endo & Exocytosis Endocytosis – large/bulk materials taken in by cell membrane pockets Exocytosis – large/bulk materials leaving the cell through membrane pockets

21 Amoeba Sisters - Membrane Transport
Crash Course - Membrane Transport

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